<template>
  <div class="login_container">
    <!-- 头像区域 -->
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登陆表单 -->
      <el-form ref="loginFormRef" :model="form" :rules="rules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="form.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="form.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLogin">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登陆表单绑定对象
      form: {
        username: 'admin',
        password: '123456'
      },
      rules: {
        username: [{
          required: true,
          message: '请输入用户名',
          trigger: 'blur'
        }, {
          min: 3,
          max: 10,
          message: '长度在 3 到 10 个字符',
          trigger: 'blur'
        }],
        password: [{
          required: true,
          message: '请输入用户名',
          trigger: 'blur'
        }, {
          min: 3,
          max: 10,
          message: '长度在 3 到 10 个字符',
          trigger: 'blur'
        }]
      }
    }
  },
  methods: {
    //   点击重置按钮，重置登陆表单
    resetLogin () {
      //   console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        const {
          data: res
        } = await this.$http.post('login', this.form)
        // console.log(result)
        if (res.meta.status !== 200) return this.$message.error('用户名错误或密码错误') // console.log('登陆失败');
        // console.log('登陆成功')；
        this.$message.success('登陆成功')
        // 1.将登陆成功之后的token,保存到客户端的sessionStroage中
        // 1.1项目中出现登陆之外的其他Api接口，必须在登陆之后才能访问
        // 1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStroage中
        // console.log(result);
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航转跳到后台页面，路由地址/home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
    /* scode表示在此区域生效，去掉全局生效 */

    .login_container {
        background-color: pink;
        height: 100%;
    }

    .login_box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }

    .avatar_box {
        height: 130px;
        width: 130px;
        border: 1px solid #111;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
    }

    img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #111;
    }

    .btns {
        display: flex;
        justify-content: flex-end;
    }

    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        /* 上下0 左右20px */
        padding: 0 20px;
        box-sizing: border-box;
    }
</style>
